有一利必有一弊

Explanation: Beneficial in this regard, on the other hand there will be bad. 　　Source: Qing Wu Jian "Twenty years have witnessed the strange status quo," the 46th with a benefit back to the world there must be something of a disadvantage, where there is no reason ills. " 　　Examples: But really as philosophers of the so-called ~ "strike while the fire started. (Lu Xun," 且介亭杂文 thing about China's 23 ") Thesaurus:  Youyilijiyouyibi